Br2+?=HBr HBr+?=MgBr2 MgBr2+?=AgBr Al+?=Alcl3 Alcl3+?=Al(OH)3 Al(OH)3+?=Na3Alo3 Na3Alo3+?=Al2(so4)3

Br2+H2=2HBr

2HBr+Mg=MgBr2+H2

MgBr2+2AgNO3=2AgBr+Mg(NO3)2

Al+FeCl3=AlCl3+Fe

AlCl3+3NaOH=Al(OH)3+3NaCl

Al(OH)3+3NaOH=Na3AlO3+3H2O

2Na3AlO3+9H2SO4=Al2(SO4)3+6Na2SO4